Baiqiancheng has been committed to providing customers with complete and high value-added PCBA solutions from solutions to products, from components to finished products for many years, laying a solid foundation for customers to open up and occupy the market.The OEM and ODM services provided by our company have significant advantages, and the services we provide have won unanimous praise from our customers.
1、 Layout of PCB components
1. When the circuit board is placed on the conveyor belt of the reflow soldering furnace, the long axis of the components should be perpendicular to the transmission direction of the equipment, so as to prevent the components from drifting on the board or "vertical monument" during the welding process.
2. The components on the PCB should be evenly distributed, especially the high-power components should be dispersed to avoid stress caused by local overheating on the PCB during circuit operation, which will affect the reliability of solder joints.
3. For components mounted on both sides, the devices with large volume on both sides shall be staggered, otherwise the welding effect will be affected due to the increase of local heat capacity during the welding process.
4. PLCC / QFP and other devices with pins on four sides cannot be placed on the wave crest welding surface.
5. For large SMT devices installed on the wave crest welding surface, its long axis should be parallel to the direction of solder wave crest flow, which can reduce solder bridging between electrodes.
6. The large and small SMT components on the wave crest welding surface shall not be arranged in a straight line and shall be staggered, so as to prevent false welding and missing welding caused by the "shadow" effect of solder wave crest during welding.
